/**
* Created with CLion.
* User:Lenovo
* Date:2023-07-04
* Time:19:19
* Description:洛谷 P3751  相遇问题
*/

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int n, m;
    scanf("%d %d", &n, &m);



    return 0;
}
